Financial Statement Details - Non-cash Operating Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Lease asset and liability additions	$ 7.9	$ 28.3	$ 0.0
Lease asset and liability modifications, net	1.7	4.8	0.0
Transfer of finance lease liability to accounts payable and accrued expenses	4.2	0.0	0.0
Receivables for property, plant and equipment related insurance proceeds	1.9	0.0	0.0
Decrease in property, plant and equipment from long-term incentive related receivables	16.4	0.0	$ 0.0
Operating lease additions due to adoption of ASC 842	$ 0.0	$ 11.0